<style>
    html,body{
        background-color: #f9f9f9;
    }
</style>
<table style="width: 100%;height: 100%">
    <tr style="height:100%;">
        <td style="width:42%;">{{ leftList }}</td>
        <td>
            <button id="bt_in" class="btn btn-success btn-sm disabled" style="margin-left:5px;margin-bottom:50px;width: 90%">
                <i class="fa fa-long-arrow-left fa-lg"></i></button>
            <button id="bt_out" class="btn btn-success  btn-sm disabled" style="margin-left:5px;margin-bottom:50px;width: 90%">
                <i class="fa fa-long-arrow-right fa-lg"></i></button>
        </td>

        <td style="width:52%;">
            {{ rightList }}
        </td>
    </tr>
</table>